If you are taking a multiple-choice test with 21 questions and each question has 6 choices (only one of which is correct), how many correct questions will you expect if you guess the answers randomly? (Give your answer in 2 d.p)

If you are taking a multiple-choice test with 21 questions and each question has 6 choices (only one of which is correct), how many correct questions will you expect if you guess the answers randomly? (Give your answer in 2 d.p)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

Sixteen pupils shared 4 baskets of camote. There were 64 pieces of camote in the first basket, 16 in the second basket, 32 in the third basket and 48 in the last basket. How many pieces of camote did each pupil get? A.8 B.10C.12D.14
Richard has been given a 12-question multiple-choice quiz in his history class. Each question has five answers, of which only one is correct. Since Richard has not attended the class recently, he doesn't know any of the answers. What is the value of n ?(n is the number of trials)
hand written asap don't answer after 8.25 pm
Take a guess: A student takes a multiple-choice test that has 11 questions. Each question has five choices. The student guesses randomly at each answer. Let-X be the number of questions answered correctly. Round the answers to at least four decimal places.
In a multiple-choice test, there are three possible answers to each question. There are 10 questions in the exam. One point is given for the correct answer but nothing is deducted for the wrong answer. To pass the exam you must get at least 5 points. Sigmundur is very bad at the study material and therefore decides what the correct answer is in each question. What are the chances that Sigmundur will pass the exam? 1. about 2%. 2. about 7%. 3. about 14%. 4. about 21%.
It asks for number of even outcomes. Is it: a. 3 b. 3/6 or 1/2
Richard has been given a 9-question multiple-choice quiz in his history class. Each question has three answers, of which only one is correct. Since Richard has not attended the class recently, he doesn't know any of the answers. What is the value of p? (p is the value of success) Round your answer to the nearest tenth.
Linda and Melusi play tennis match; the first person to win three games wins the match. In how many ways can the winner be determined? A. 3 B. 4 C. 6 D. 5 E. 2
If 2 dice are rolled and X = the sum of the values, what is P(X = 8)? O 1÷6 O 4÷36 O 5÷36 O 1÷8
When rolling a number cube, labeled 1 through 6,P(4) is twice as likely to occur as P (2).
The U.S. Open Golf Tournament was played at Congressional Country Club, Bethesda, Maryland, with prizes ranging from $465,000 for first place to $5000. Par for the course is 70. The tournament consists of four rounds played on different days. The scores for each round of the 32 players who placed in the money (more than $17,000) are given. The scores for the first round were as follows. 71 65 67 73 74 73 70 75 71 72 71 75 75 71 71 72 72 73 71 67 66 75 75 75 71 The scores for the fourth round for these players were as follows. 69 69 73 73 73 74 72 72 70 71 71 72 71 71 71 71 69 70 72 74 72 71 68 69 70 69 71 73 74 1 2 3 4 (a) Make a stem-and-leaf display for the first-round scores. Use two lines per stem. (Enter your answers from smallest to largest separated by spaces. Enter NONE for stems with no leaves.) First-Round Scores X X X X 5 6 7 8 71 71 74 73 71 74 75 NONE NONE NONE NONE 70 NONE 72 73 (b) Make a stem-and-leaf display for the fourth-round scores. Use two lines per stem. (Enter…